Evidence check: Östradiol in the context of Haut

Estradiol (E2) is the primary female sex hormone and has well-documented effects on skin health: it promotes collagen synthesis, skin thickness, and hydration. Declining estradiol levels, as seen during menopause, are associated with accelerated skin aging, wrinkle formation, and loss of elasticity. The evidence comes mainly from observational studies and physiological models – randomized controlled trials on topical or systemic estradiol for skin aging are limited and show moderate effects. MyBody-X tests can measure estradiol levels in saliva or blood, but these are not diagnostic and should not be the sole basis for anti-aging interventions. Genetic variants affecting estradiol metabolism (e.g., in CYP19A1) may be included in MyBody-X DNA tests, but their clinical relevance for skin aging is unclear. Caution: hormonal interventions without medical supervision carry risks. The evidence for personalized skincare based on estradiol levels or genetics is currently weak to moderate. A healthy lifestyle (diet, sun protection, sleep) has a larger and better-documented impact on skin aging.